char a char-priority 1 = 0= throw
char z char-priority 26 = 0= throw
char A char-priority 27 = 0= throw
char Z char-priority 52 = 0= throw

s" RNCBcwmHr" s" tdltdtmhl"
common-char drop char m = 0= throw
s" HRzCCRZNBRrRwMNwHH" s" WDzDPnvvGnsWLWpGJJ"
common-char drop char z = 0= throw
s" ddgShFQhjljqhggbdbbt" s" DsDsQnJDnWsJnJvrQDPJ"
common-char drop char Q = 0= throw
s" DSRHPhHmRSnndHnHRM" s" LqvbLLTdvlfdqTLtbv"
common-char drop char d = 0= throw
